Which have more massive supermassive black holes, spiral galaxies like Andromeda or elliptical galaxies like Cygnus A?
A) Both are the same.
B) Spirals.
C) Ellipticals.
D) Neither type of galaxies has supermassiave black holes.
E) Supermassive black holes do not exist at all.
Ans: C) Ellipticals.
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The smelting of a metal
(a) Raises the temperature above the melting point. (b) Separates the metal from the ore. (c) Deforms the metal into a shape. (d) Cools the metal very rapidly from a high temperature.
Energy balance in the Sun refers to a balance between ________
A) the force of gravity pulling inward and the force due to pressure pushing outward B) the amount of energy the Sun radiates into space and the amount of energy that reaches Earth C) the rate at which fusion generates energy in the Sun's core and the rate at which the Sun's surface radiates energy into space D) the mass that the Sun loses each second and the amount of mass converted into energy each second
Isobaric work is
A) V ?p. B) p ?T. C) p ?V. D) Q - W. E) Q + W.
Small icy bodies in the solar system which travel about the Sun in highly eccentric orbits and come from all directions are ________
Fill in the blank(s) with correct word